| 层状介质二维电阻率扰动反演方法 |
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| 引用本文： | 闫永利,马晓冰,底青云,孔祥儒,高立兵,陈刚.层状介质二维电阻率扰动反演方法[J].地球物理学报,2004,47(6):1139-1144. |
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| 作者姓名： | 闫永利 马晓冰 底青云 孔祥儒 高立兵 陈刚 |
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| 作者单位： | 1.中国科学院地质与地球物理研究所，北京 100029 2 中国社会科学院考古研究所，北京 100717 |
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| 基金项目： | 国家自然科学基金资助项目 ( 4 96742 3 4,40 0 740 3 4) |
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| 摘 要： | 为解决考古、工程地质和地下水污染勘查中某些探测靶体与周围介质间电性差异不大的地质问题，本文提出了层状介质背景下二维电阻率扰动反演方法．根据观测得到的背景剖面视电阻率断面，确定出背景场的电性层结构，利用电阻率扰动方法计算出敏感矩阵，通过广义逆矩阵法求解出电阻率的增量．在商丘地下夯土城墙的应用表明，该方法有效地抑制了夯土城墙的旁侧效应和地下水噪声的影响，揭示出地下夯土城墙的埋深与几何形态．
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| 关 键 词： | 电阻率 扰动 反演 地下城墙 |
| 文章编号： | 0001-5733(2004)06-1139-06 |
| 收稿时间： | 2003-9-28 |
| 修稿时间： | 2004-6-24 |
2D RESISTIVITY INVERSION OF PERTURBATION IN THE LAYERED-EARTH |
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| YAN Yong-Li MA Xiao-Bing DI Qing-Yun KONG Xiang-Ru GAO Li-Bing CHEN Gang Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing ,China Institute of Archaeology,Chinese Academy of Social Sciences,Beijing ,China.2D RESISTIVITY INVERSION OF PERTURBATION IN THE LAYERED-EARTH[J].Chinese Journal of Geophysics,2004,47(6):1139-1144. |
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| Authors: | YAN Yong-Li MA Xiao-Bing DI Qing-Yun KONG Xiang-Ru GAO Li-Bing CHEN Gang Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China Institute of Archaeology Chinese Academy of Social Sciences Beijing China |
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| Institution: | 1.Institute of Geology and Geophysics，Chinese Academy of Sciences，Beijing 100029，China 2 Institute of Archaeology，Chinese Academy of Social Sciences，Beijing 100717，China |
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| Abstract: | To solve some geological problems with no sharp resistivity contrast between geological targets and surrounding media,such as prospecting in archaeology,geological engineering and underground water pollution,we propose a method for 2-D resistivity inversion of perturbation in the layered earth.First the electrical structure of background is determined from observed apparent resistivity section.Then the sensitivity matrix is calculated based on the perturbation of resistivity.Finally we use general inverse matrix to solve increment of resistivity.The results for underground rammed walls in the Shangqiu area demonstrate that the method effectively reduces geological noises caused by underground water and clearly shows the position and shape of the underground wall. |
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| Keywords: | Resistivity Perturbation Inversion Underground wall |
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